AT&T DSL Internet Support Ticket

dsl overcharges - AT&T DSL

have had 768k service for last 55 yrs and been charged for 6 gig bites. the first is 14,95 a month, the second is 51.00 a month.
AT&T rep says all this is my fault for not checking my bill. Well I trusted them that they was giving me the 6 gig service until there own tech pointed out that my zip code has only ever had their lite service.